Optical fiber ribbon and optical fiber cable

Abstract

An optical fiber ribbon includes a plurality of optical fiber cores arranged in parallel spaced from each other; and a tape forming member having a coating portion covering an outer circumference of the optical fiber cores, and a coupling portion, integrally formed with the coating portion, intermittently coupling adjacent optical fiber cores, wherein the coating portion has an opening portion to expose a part of surfaces of the optical fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores.

The invention claimed is: 
     
       1. An optical fiber ribbon comprising:
 a plurality of optical fiber cores arranged in parallel spaced from each other; and 
 a tape forming member having coating portions covering each outer circumference of the optical fiber cores, spaced each other, and a coupling portion, integrally formed with the coating portion, intermittently coupling the coating portions each covering adjacent optical fiber cores, 
 wherein each thickness of the coupling portions is less than each thickness of the optical fiber cores including the coating portions, and 
 each of the coating portions has an opening portion to expose a part of a surface of only a respective one of the optical fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores. 
 
     
     
       2. The optical fiber ribbon of  claim 1 , wherein each thickness of the coupling portions is less than each diameter of the optical fiber cores. 
     
     
       3. The optical fiber ribbon of  claim 1 , wherein each thickness of the coupling portions is 1 μm to 120 μm. 
     
     
       4. The optical fiber ribbon of  claim 1 , wherein each of the coupling portions are formed between the optical fiber cores. 
     
     
       5. The optical fiber ribbon of  claim 1 , wherein the opening portions per each single core of the optical fiber cores are formed at least one for each 5 cm in the longitudinal direction. 
     
     
       6. The optical fiber ribbon of  claim 1 , wherein the tape forming member is formed by an ultraviolet curing resin. 
     
     
       7. The optical fiber ribbon of  claim 1 , wherein each cross-section exposing angle of the opening portions are 15° or more, and 270° or less. 
     
     
       8. An optical fiber cable implementing an optical fiber ribbon, the optical fiber ribbon comprising:
 a plurality of optical fiber cores arranged in parallel spaced from each other; and 
 a tape forming member having coating portions covering each outer circumference of the optical fiber cores, spaced each other, and a coupling portion, integrally formed with the coating portion, intermittently coupling the coating portions each covering adjacent optical fiber cores, 
 wherein each thickness of the coupling portions is less than each thickness of the optical fiber cores including the coating portions, and 
 each of the coating portions has an opening portion to expose a part of a surface of only a respective one of the optical fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores. 
 
     
     
       9. The optical fiber cable of  claim 8 , wherein each thickness of the coupling portions is less than each diameter of the optical fiber cores. 
     
     
       10. The optical fiber cable of  claim 8 , wherein each thickness of the coupling portions is 1 μm to 120 μm. 
     
     
       11. The optical fiber cable of  claim 8 , wherein each of the coupling portions are formed between the optical fiber cores. 
     
     
       12. The optical fiber cable of  claim 8 , wherein the opening portions per each single core of the optical fiber cores are formed at least one for each 5 cm in the longitudinal direction. 
     
     
       13. The optical fiber cable of  claim 8 , wherein the tape forming member is formed by an ultraviolet curing resin. 
     
     
       14. The optical fiber cable of  claim 8 , wherein each cross-section exposing angle of the opening portions are 15° or more, and 270° or less.